KERNEL_PATH=/home/li/hqyj_study/18lv-linuxDriver-one/02day_env/linux-5.4.31
ifeq ($(KERNELRELEASE),)
all:
	make -C $(KERNEL_PATH) M=$(PWD) modules
clean:
	make -C $(KERNEL_PATH) M=$(PWD) clean
else
	obj-m += printkall.o
endif